Polish Potato Soup

Peel and slice and put in crockpot:

7-10 potatoes, peeled and chopped
3-5 carrots, peeled and sliced
1 1/2 Qts. water
1/4 tsp black pepper
3 celery stalks, sliced
1 large onion, sliced or minced
2 C chicken stock
1/2 tsp salt
2 TBS butter
2 TBS whole wheat flour
1 C sour cream

-cook on high in crockpot 6-8 hours.